Chip loss causing early failure and the long-term effects. Ben Rohde, Central Otago NOC


Central Otago has come to the realisation that we are finding unexpected early failure of some surfacing types – So we have been busy digging deeper into the data and around the network to better understand the cause, effect on expected life, and potential techniques to prolong the life achieved.
Over the last year we have noticed that certain surfaces have been showing significant signs of distress and early failure, a large portion of our post winter RAPA. A consistent factor recognised early on was that they seemed to fit a time period from approx. 2009-2014. As we dug deeper we also started to recognise that the surfacing types were starting to show some consistencies.
As we continue to delve into the techniques used and the resulting effects we look to the future and what impacts this will have on the network long term including trialling techniques to minimise the chip loss and gain surface life prior to renewal being required.
This study is ongoing and the results are currently unknown however we aim to have the initial research completed this season which times well for the 2020 conference.

Ben has been involved with asset management in some shape or form for the past 14 years. Learning the various disciplines of engineering that support the data driven decision making that asset management uses to form our FWPs.